EP3236208A1 - Procédé d'étalonnage d'un semoir agricole - Google Patents

Procédé d'étalonnage d'un semoir agricole Download PDF

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Publication number
EP3236208A1
EP3236208A1 EP17175035.9A EP17175035A EP3236208A1 EP 3236208 A1 EP3236208 A1 EP 3236208A1 EP 17175035 A EP17175035 A EP 17175035A EP 3236208 A1 EP3236208 A1 EP 3236208A1
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EP
European Patent Office
Prior art keywords
seed
planter
swath
seeds
control unit
Prior art date
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Granted
Application number
EP17175035.9A
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German (de)
English (en)
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EP3236208B1 (fr
Inventor
Phil Baurer
Keith Beyer
Ben Schlipf
Justin Koch
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Precision Planting LLC
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Precision Planting LLC
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Application filed by Precision Planting LLC filed Critical Precision Planting LLC
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C7/00—Sowing
    • A01C7/08—Broadcast seeders; Seeders depositing seeds in rows
    • A01C7/10—Devices for adjusting the seed-box ; Regulation of machines for depositing quantities at intervals
    • A01C7/102—Regulating or controlling the seed rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C21/00—Methods of fertilising, sowing or planting
    • A01C21/005—Following a specific plan, e.g. pattern
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C7/00—Sowing
    • A01C7/08—Broadcast seeders; Seeders depositing seeds in rows
    • A01C7/10—Devices for adjusting the seed-box ; Regulation of machines for depositing quantities at intervals
    • A01C7/107—Calibration of the seed rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0016—Time-frequency-code
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0016—Time-frequency-code
    • H04L5/0019—Time-frequency-code in which one code is applied, as a temporal sequence, to all frequencies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C7/00—Sowing
    • A01C7/08—Broadcast seeders; Seeders depositing seeds in rows
    • A01C7/10—Devices for adjusting the seed-box ; Regulation of machines for depositing quantities at intervals
    • A01C7/102—Regulating or controlling the seed rate
    • A01C7/105—Seed sensors

Definitions

  • Planters with variable rate seeding (“VRS”) control systems which allow the seeding rate to be varied while on-the-go based on soil type and soil conditions are well known in the art.
  • VRS variable rate seeding
  • VRS and swath control systems cooperate with Global Position Systems (“GPS”) and field coverage maps to control the seed meter by engaging and disengaging drive clutches so as to control the rotation and/or speed of rotation of the seed disc for vacuum meters or the rotation of the fingers for finger pick-up meters.
  • GPS Global Position Systems
  • field coverage maps to control the seed meter by engaging and disengaging drive clutches so as to control the rotation and/or speed of rotation of the seed disc for vacuum meters or the rotation of the fingers for finger pick-up meters.
  • GPS Global Position Systems
  • field coverage maps to control the seed meter by engaging and disengaging drive clutches so as to control the rotation and/or speed of rotation of the seed disc for vacuum meters or the rotation of the fingers for finger pick-up meters.
  • Such systems rely on planter location at the time commands are sent to the VRS and swath control systems rather than accurately determining when the seed is actually physically placed in the field.
  • significant overplanting, underplanting or other inaccuracies can still occur with
  • the field coverage map will show that the area has been planted even though no seed was actually dispensed. It would then be difficult to truly plant that area once the farmer realized the error.
  • FIGs. 1-5 show a planter 10 planting seeds 11 in a field 13 in which the headland 15 has been previously planted.
  • FIGs. 1-5 are intended to illustrate for comparison purposes "overplanting” and “underplanting” planting techniques using an eight-row planter without swath control ( FIGs. 1-3 ) and then with swath control ( FIGs. 4-5 ).
  • FIG. 1 shows an eight-row planter without swath control overplanting the headland 15 (i.e., where planting continues across all rows until the last row is within the headland 15).
  • FIG. 2 illustrates an eight-row planter without swath control underplanting the headland 15 (i.e., where planting stops across all rows as soon as the first row enters the headland 15).
  • FIG. 3 shows an eight-row planter without swath control illustrating 50-50 underplanting-overplanting of the headland 15 (i.e., where planting continues across all rows until half of the rows enter the headland 15). It should be understood that the opposite occurs when exiting a headland.
  • planting begins across all rows as soon as the first row of the planter exits the headland. Likewise, when exiting a headland using the underplanting technique, planting does not begin across all rows until the last row exits the headland. With the 50/50 technique, planting begins across all rows when half of the rows exit the headland.
  • FIG. 4 shows an eight-row planter with swath control on every row of the planter (hereinafter a "1-row swath control").
  • FIGs. 5A-5C illustrate an eight-row planter with swath control for every two rows of the planter (hereinafter a "2-row swath control”).
  • swath control may include any desired number of rows. Comparing FIGs. 1-3 with FIG. 4 , one can clearly see that a 1-row swath control system will ideally plant a field with little or no overplanting or underplanting thereby minimizing wasted seed and unplanted areas resulting in improved yield, all other factors being equal. Similarly, comparing FIGs. 1-3 with FIGs. 5A , 5B and 5C , one can clearly see that a 2-row swath control system will ideally plant a field with only minimal overplanting or underplanting when compared to conventional planters without swath control.
  • FIG. 6 shows a field 13 having two different soil types 15, 17 designated by different hatch patterns, separated by an inner boundary 19.
  • the different soil types are shown planted with different seed populations (note different spacing of seeds 11 between the different soil types 15, 17) using a planter with VRS and 1-row swath control wherein as each row unit passed the inner boundary 19, the VRS was engaged to change the seed population to the different soil type.
  • FIG. 7 illustrates a seeding control system 1005 that cooperates with the row units 12 of a planter 10 to improve yield by taking the above-identified factors and other factors into consideration for precise mapping of seed placement in the field.
  • the row unit 12 is illustrated as a row unit for a central-fill planter such as disclosed in U.S. Patent No. 7,438,006 , incorporated herein in its entirety by reference, but it should be appreciated that the seeding control system 1005 may be used with more conventional row units such as disclosed in US Patent No. 4,009,668 , also incorporated herein in its entirety by reference, or any other type of row unit for any make or model of a planter.
  • the row units 12 are spaced along a toolbar 14 of the planter main frame.
  • the planter main frame is attached to a tractor (not shown) in a conventional manner, such as by a drawbar or three-point hitch arrangement as is well known in the art.
  • Ground wheel assemblies support the main frame above the ground surface and are moveable relative to the main frame through actuation of the planter's hydraulic system (not shown) coupled to the tractor's hydraulics to raise and lower the planter main frame between a transport position and a planting position, respectively.
  • Each row unit 12 is preferably supported from the toolbar 14 by a parallel linkage 16 which permits each row unit 12 to move vertically independently of the toolbar 14 and the other spaced row units in order to accommodate changes in terrain or upon the row unit encountering a rock or other obstruction as the planter is drawn through the field.
  • Each row unit 12 includes a seed meter 30, a seed tube or other seed path 32, a furrow opening assembly 34 and a furrow closing assembly 36.
  • the furrow opening assembly cuts a furrow 38 into the soil surface 40 as the planter 10 is drawn through the field.
  • a constant supply of seed 11 is communicated to the seed meter 30.
  • the seed meter 30 discharges individual seeds 11 into the seed tube 32 at spaced intervals based on the seed population desired and the speed at which the planter is drawn through the field.
  • the seed 11 drops from the end of the seed tube 32 into the furrow 38 formed by the furrow opening assembly 34.
  • the seeds 11 are then covered with soil by the closing wheel assembly 36.
  • the seed sensor 200 sends a seed pulse to the planter monitor 1000.
  • the planter monitor 1000 associates the time of the seed pulse with a location of the GPS unit 100 to determine the precise location of the planted seed within the field by taking into account the planter speed, seed population, offset distances, etc., all previously determined and calibrated during setup and calibration phases (discussed later) to generate a precise seed placement map. Based on the generated seed placement map, the planter monitor 1000 will determine if a "stop-planting" condition exists when a row unit or swath (i.e.
  • one or more row units controlled by a swath controller 1500) of the planter 10 passes over a previously planted seed or when a row unit or swath travels across a headland, an outer boundary or an inner boundary of the field. If a stop-planting condition exists for a particular row unit or swath, a signal will be generated to disengage a clutch taking into account various factors such as planter speed, changes in acceleration, clutch delays, seed drop delays, etc., all previously determined and calibrated during the setup and calibration phases (discussed later) such that the corresponding seed meters cease dispensing seed at the appropriate time and to resume dispensing seed at the appropriate time after the "stop planting" condition has passes so as to ensure minimal overplanting or underplanting of the field.
  • the seeding control system 1005 preferably includes a GPS (global positioning system) unit 100, seed sensors 200, a control unit 350, and height sensors 705, a planter monitor 1000, a cab module 1105 and a radar system 1205 which cooperate to control a variable rate drives 1600 and swath controllers 1500 of the planter 10 to minimize overplanting and underplanting of fields.
  • GPS global positioning system
  • the planter monitor 1000 is typically mounted in the tractor cab so it can be easily viewed and interfaced with by the operator while planting.
  • a preferred planter monitor 1000 is the 20/20 SeedSense® from Precision Planting, Inc., 23207 Townline Road, Tremont, IL 61568 and as disclosed in published U.S. patent application Pub. No. US 2010/0010667 , incorporated herein in its entirety by reference.
  • the planter monitor preferably utilizes a touch screen graphic user interface (GUI) and includes microprocessor, memory and other applicable hardware and software for receiving, storing, processing, communicating, displaying and performing the various features and functionalities as hereinafter described (hereinafter, collectively, the "processing circuitry") as readily understood by those skilled in the art.
  • GUI touch screen graphic user interface
  • the planter monitor 1000 is preferably configured to communicate with a data transfer device such as a USB flash drive, internet connection or any other data transfer means for input and retrieving seed population rates, field mapping information, etc.
  • a data transfer device such as a USB flash drive, internet connection or any other data transfer means for input and retrieving seed population rates, field mapping information, etc.
  • the planter monitor 1000 is in electrical communication (via wires or wirelessly) to receive input signals from the seed sensors 200, a GPS unit 100 and the cab module 1105.
  • Seed sensors 200 are mounted to the seed tubes 32 of the row units 12 to detect the passage of seed therethrough.
  • a common seed sensor 200 is a photoelectric sensor, such as manufactured by Dickey-John Corporation, 5200 Dickey-John Road, Auburn, Ill. 62615.
  • a typical photoelectric sensor generally includes a light source element and a light receiving element disposed over apertures in the forward and rearward walls of the seed tube. In operation, whenever a seed passes between the light source and the light receiver, the passing seed interrupts the light beam causing the sensor 200 to generate a seed pulse or electrical signal indicating the detection of the passing of a seed. It should be appreciated that any type of seed sensor capable of producing an electrical signal to designate the passing of a seed may be used.
  • the GPS unit 100 is configured to receive a GPS signal, comprises a series of GPS data strings, from a satellite (not shown). The GPS signal is communicated to the planter monitor 1000.
  • a preferred GPS unit 100 is a Deluo PMB-288 available from Deluo, LLC, 10084 NW 53rd Street, Sunrise, FL 33351, or other suitable device.
  • the GPS unit 100 is used to monitor the speed and the distances traveled by the planter 10.
  • the output of the GPS unit 100 including the planter speed and distances traveled by the planter, is communicated to the planter monitor 1000 for display to the planter operator and/or for use in various algorithms for deriving relevant data used in connection with the preferred system and method of the present invention.
  • the GPS unit 100 comprises a positioning system configured to use the signals of other satellite systems such as GLONASS or Galileo.
  • the GPS unit 100 may comprise any other positioning system configured to determine the latitudinal and longitudinal position of the planter 10.
  • the seeding control system 1005 preferably includes a radar system 1205 to determine a speed of the planter 10 because empirical data has shown that data from the GPS unit 100 is delayed and untrustworthy at speeds lower than approximately one mile per hour (1 mph). Empirical data has also shown that the GPS unit 100 will indicate speeds of 0.1 or 0.2 mph when the planter 10 is actually stopped. For these reasons, speed inputs provided by GPS systems alone are non-ideal for accurately determining when a planter 10 has stopped or for predicting when the planter will stop (for reasons discussed later) or when determining if the planter 10 has resumed travel.
  • the radar system 1205 is placed in a fixed location and sends a radar signal to the cab module 1105 which in turn communicates the radar signal to the planter monitor 1000 for displaying the planter speed.
  • the cab module 1105 is preferably mounted in the tractor cab such that it too can be easily viewed and interfaced with by the operator while planting.
  • the cab module 1105 preferably includes switches configured to allow the operator to turn the variable rate drives 1600 on and off and to selectively engage and disengage the swath controllers 1500 during pre-planting calibration routines (discussed later).
  • the cab module 1105 also communication with the radar system 1205 and includes processing circuitry configured to determine whether the radar-reported speed is stable for reasons discussed later.
  • the height sensors 705 may comprise a contact switch configured to close or open a circuit when the gauge wheel arms of the furrow opening assembly 34 are no longer in contact with the gauge wheel arm stop indicating that the planter is in a transport position or otherwise raised above the soil.
  • the height sensor 705 may also comprise any sensor mounted to a location on the planter 10 that determines the height of said location relative to the soil surface 40 for purposes of indicating that the row unit is in a transport position or otherwise raised above the soil.
  • the control unit 350 preferably includes an inclinometer 600, vertical accelerometer 500, a horizontal accelerometer 400 and appropriate processing circuitry all physically integrated into a single unit that is preferably mounted to the toolbar 14 of the planter 10, but which may be mounted in other suitable location and in any orientation appropriate to measure the horizontal acceleration, vertical acceleration, and inclination of the tractor and/or toolbar 14.
  • the control unit 350 is in electrical communication (via wires or wirelessly) with the swath control 1500, the variable rate drives 1600, the height sensors 705 and the cab module 1105. More than one control unit 350 may be utilized.
  • a setup phase the operator is preferably able to select the tractor make and model and the planter make and model preferably through drop down selection menus.
  • the geometry of the various tractor and planter makes and models are preferably stored in memory to make the setup phase quicker and easier so the operator does not have to physically measure each of the various distances discussed below for modeling the geometry of the planter and the offset distances to the GPS unit 100.
  • the seeding control system 1005 uses these distances to determine the location of each seed sensor 200 based on a location of the GPS unit 100.
  • the following method and illustrations assume that the GPS unit 100 is mounted on the tractor cab, although it should be appreciated that other mounting locations (such as the planter 10 itself) are possible.
  • FIG. 8 illustrates an embodiment of a setup screen 1200 displayed by the planter monitor 1000 for entering GPS offsets with respect to the tractor.
  • the offset distances include the distance 1202 from the GPS unit 100 to the centerline of the rear wheels of tractor, a distance 1206 to the centerline of the tractor, a distance 1210 from the centerline of the rear wheels of the tractor to the pivot of the tractor, and a distance 1214 to the ground.
  • the distance 1202 to the centerline of the rear wheels of the tractor is used to model the location of the planter 10 while raised in a transport position behind the tractor.
  • FIG. 9 illustrates an embodiment of another setup screen 1300 displayed by the planter monitor 1000 for entering locations on the planter 10 with respect to the planter pivot point.
  • the operator may be prompted to select the planter frame type and/or hitch style, such as drawn, 2-point pivot, and 3-point.
  • the planter monitor 1000 preferably displays an image 1306 representing the geometry of the selected planter frame type and/or hitch style and prompts the operator to enter distances needed to model the planter geometry.
  • the planter monitor 1000 requires the operator to enter the distance 1308 between the pivot and the centerline of the gauge wheels 48 as well as the distance 1312 between the pivot and the seed exit.
  • the planter monitor 1000 assumes transverse distances from the seed exits of each of the row units to the centerline of the tractor based on the planter make and model previously entered by the operator. Alternatively, the operator selects the custom table setup window 1316 and enters transverse distances 1318 from each seed exit to the centerline of the planter 10.
  • FIG. 10A illustrates another embodiment of a setup screen 1400 prompting the operator to place flags 1405 next to the gauge wheels 48 of the rightmost and leftmost row units of the planter 10.
  • the planter monitor 1000 records a first test location of the GPS unit 100.
  • FIGS. 10B and 10C illustrate embodiments of subsequent setup screens 1410 and 1420 prompting the operator to turn the planter 10 around such that the flags 1405 are adjacent to the gauge wheels 48 on the opposite sides of the planter 10.
  • the planter monitor records a second test location of the GPS unit 100.
  • the sum 1432 of the distances 1202, 1210, and 1308 previously entered by the operator is calculated.
  • the measured distance 1435 from the GPS unit 100 to the planter gauge wheels is also determined by dividing the distance along the direction of travel between the first test location and the second test location by two. The operator is prompted to re-measure the previously entered GPS offsets if the measured distance 1435 is different from the sum 1432.
  • the distance 1206 previously entered by the operator is displayed.
  • the measured distance 1445 corresponding to the distance 1206 is determined by dividing the transverse distance between the first test location and the second test location by two. The operator is prompted to re-measure the previously entered GPS offsets if the measured distance is different from the distance 1206 previously entered by the operator.
  • the operator configures the planter swath control.
  • the operator enters the number of swath controllers 1500 and the number of row units controlled by each swath controller.
  • the operator is preferably able to choose a coverage pattern.
  • the illustrated planter 10 has four swath controllers 1500 each controlling two row units.
  • the operator selects windows 1510 a , 1510 b , or 1510 c to choose whether the swath controllers 1500 encounter a stop-planting boundary 1505 at the previously planted seed, at a half-row offset from the previously planted seed, or at full row offset from the previously planted seed, respectively.
  • the operator has selected a full row offset (1510c).
  • the operator selects windows 1520 a , 1520 b , or 1520 c to choose whether the swath controllers are to stop planting when any row of the swath controller crosses the stop-planting boundary 1505 ("Under-Plant"), when any row along transverse line 1515 of the planter crosses the stop-planting boundary 1505 ("50%-50%”), or when every row controlled by the swath controller has crossed the stop-planting boundary 1505 ("Over-Plant”), respectively.
  • the operator has selected 50%-50% (1520b).
  • variable rate drives 1600 In a further setup phase, the operator configures the variable rate drives 1600.
  • the operator indicates which rows are driven by each variable rate drive 1600.
  • the operator enters the number of encoder pulses per rotation (discussed later) and the encoder pulse signal frequency (discussed later) of each variable rate drive 1600.
  • the operator selects a make or type of variable rate drive 1600 which is associated with the same pulse and frequency characteristics.
  • the operator is further prompted to enter the number of seeds per disk on the seed meters 30 driven by each variable rate drive 1600.
  • the operator further initiates a calibration routine (discussed later) in which the seeding control system 1005 drives the seed meters 30 and determines a drive ratio between the variable rate drives 1600 and the seed meters 30. Alternatively, the operator enters a drive ratio.
  • the operator prescribes a default seed population rate to be used by the variable rate drive 1600 if the seeding control system 1005 loses the signal from the GPS unit 100.
  • the operator further configures the radar system 1205 in a test run.
  • the operator drives the tractor and the planter monitor 1000 receives radar pulses from the radar system 1205.
  • the planter monitor 1000 determines how far the tractor has traveled using the signal from the GPS unit 100.
  • the planter monitor 1000 determines how many radar pulses are received per unit distance traveled.
  • the operator further selects whether the GPS unit 100 or the radar system 1205 is the primary or most trusted speed source used by the planter monitor 1000. As described later under "Operation," the planter monitor 1000 will determine whether to override the operator's choice of primary speed source based on the planter acceleration.
  • the seeding control system 1005 is preferably configured to run a process 1610 to identify an operational problem with the variable rate drives 1600 or swath controllers 1500.
  • the control unit 350 preferably starts one or more variable rate drives 1600 and engages one or more swath controllers 1500 to drive the seed meters.
  • a predetermined time period e.g., 5 seconds
  • the control unit 350 then disengages one or more swath controllers 1500 at block 1613 and stores the subset of rows 12 at which the seed pulses are observed after a predetermined time at block 1614.
  • the control unit 350 compares expected to actual presence of seeds for each tested configuration and assigns an operational descriptor (e.g., "Good” or "Failed") to each swath controller 1500 and variable rate drive 1600.
  • the planter monitor 1000 preferably displays an operational summary indicating whether components (e.g., swath controllers 1500 or variable rate drives 1600) are working properly.
  • the operational summary may comprise a screen 1620 including a result summary 1622 of expected and actual observation of seed pulses for each component tested, and preferably includes an alarm indicator 1624 alerting the operator that a component associated with the indicator has failed.
  • control unit 350 may be configured to engage or disengage each variable rate drive and swath controller in series (e.g., from right to left) during a setup phase, allowing the operator to determine by sight or sound whether each component is operating properly.
  • the seeding control system 1005 is preferably configured to use the seed pulses generated by the seed sensors 200 to calibrate the swath controllers 1500 and variable rate drives 1600.
  • the calibration routines described herein measure a delay between a control signal and an operational change detected by the seed sensors 200.
  • the operational change may include changing the rate of seed delivery, stopping seed delivery or starting seed delivery. It should be appreciated, however, that a delay associated with any operational change involving seed delivery could be measured according to the calibration routines described herein.
  • FIG. 12 illustrates an embodiment of a process 2000 to calibrate the variable rate drives 1600.
  • the control unit 350 instructs the variable rate drive 1600 to run.
  • the planter monitor 1000 prompts the operator to check the seed hopper for seeds 11 or otherwise correct the operation of the planter 10 such that seeds 11 will begin being discharged by the seed meter 30 through the seed tube 32. If the control unit 350 receives a seed pulse, then at block 2300, after a predefined time, the control unit 350 instructs the variable rate drive 1600 to stop driving the seed meter 30 at a time t 0 . Time t 0 is stored by the control unit 350.
  • the control unit 350 then receives seed pulses at block 2400 until no seed pulse is received for a predetermined time (e.g., 5 seconds). At block 2450, the control unit then records the time of the last seed pulse (t stop ). The difference between t stop and t 0 represents a stop delay associated with the variable rate drive 1600, which stop delay is calculated and stored by the control unit 350 at block 2455.
  • FIG. 13A illustrates an embodiment of a process 2500 to calibrate the variable rate drives 1600.
  • the control unit 350 instructs the variable rate drive 1600 to stop.
  • the control unit 350 instructs the variable rate drive 1600 to start driving the seed meter 30 at a time t 0 .
  • Time t 0 is stored by the control unit 350. If a seed pulse is received by the control unit 350 at block 2530, then the control unit records the time of the first seed pulse (t start ) at block 2540. The difference between t start and to represents a start delay associated with the variable rate drive 1600, which start delay is calculated and stored by the control unit 350 at block 2545.
  • control unit 350 preferably uses the start delay and stop delay to adjust the time at which the control unit 350 sends control signals to the variable rate drives 1600 such that seed begins to dispense or stops dispensing at the desired position in the field.
  • the control unit 350 estimates the time to the next stop-planting boundary at block 2552 (preferably using the current planter speed and the distance to the boundary) and compares said time to the motor stop delay at block 2554. If the time to the next stop-planting boundary is equal to the motor stop delay, then the control unit 350 preferably stops the motor at block 2556.
  • the control unit 350 estimates the time to the next start-planting boundary at block 2562 (preferably using the current planter speed and the distance to the boundary) and compares said time to the motor stop delay at block 2564. If the time to the next start-planting boundary is equal to the motor stop delay, then the control unit 350 preferably starts the motor at block 2566.
  • control unit 350 times the subsequent control signals based on the various delays measured as described herein.
  • the above calibration process may be performed during in-field operation in order to determine the start delay and stop delay of the variable rate drives under current or near-current operating conditions.
  • FIG. 14 illustrates an embodiment of process 3000 to determine a drive ratio between the variable rate drive 1600 and the seed meter 30.
  • the control unit 350 instructs the variable rate drive 1600 to drive the seed meter 30.
  • the planter monitor 1000 prompts the operator to check the seed hopper for seeds 11 or otherwise correct the operation of the planter 10 such that seeds 11 will begin being discharged by the seed meter 30 through the seed tube 32.
  • the control unit 350 stores the time of the first observed seed pulse (t 1 ) at block 3300.
  • the control unit 350 receives a predetermined number of seed pulses, e.g., 30, at block 3400, the control unit 350 stores the time of the thirtieth seed pulse (t 30 ) at block 3450.
  • the difference between t 30 and t 1 divided by the number of seed pulses is equal to a time associated with a time between the release of seeds 11 by the seed meter 30 (t nominal ).
  • Number of seeds per meter Total number of seed cavities, apertures or other seed entraining features on each seed meter 30.
  • the drive ratio R between the variable rate drive 1600 and the seed meter 30 is equal to the ratio between the number of encoder pulses that must be observed before the seed meter 30 has made one fall revolution and the number of encoder pulses per revolution of the variable rate drive 1600.
  • the drive ratio R is preferably used by the control unit 350 to determine the rate at which to drive the variable rate drive 1600 in order to obtain a given speed w m of the seed meter and thus a corresponding time t nominal between the release of seeds 11.
  • the values of t nominal , w m , and R are preferably calculated at step 3455 of process flow 3000.
  • FIG. 15A illustrates an embodiment of a process 3500 to determine a clutch start delay and clutch stop delay associated with a swath controller 1500.
  • the control unit 350 instructs the variable rate drive 1600 to run.
  • the planter monitor 1000 prompts the operator to check the seed hopper for seeds 11 or otherwise correct the operation of the planter 10 such that seeds 11 will begin being discharged by the seed meter 30 through the seed tube 32.
  • control unit 350 receives a seed pulse, then after a predetermined time the control unit 350 instructs the swath controller 1500 to disengage at a time t 0 in order to stop the seed meter 30 from being driven by the variable rate drive 1600.
  • Time t 0 is stored by the control unit 350.
  • the control unit 350 receives seed pulses at block 3540 until no seed pulse is received for a predetermined time.
  • the control unit then records the time of the last seed pulse (t stop ).
  • the difference between t stop and t 0 represents a clutch stop delay associated with the swath controller 1500.
  • the control unit 350 preferably calculates the clutch stop delay at block 3555.
  • the control unit 350 then instructs the swath controller 1500 to engage at a time t 1 such that the seed meter 30 is again driven by the variable rate drive 1600.
  • Time t 1 is stored by the control unit 350.
  • the control unit records the time of the first seed pulse (t start ).
  • the difference between t start and t 1 represents a clutch start delay associated with the swath controller 1500.
  • the control unit 350 preferably calculates the clutch start delay at block 3585.
  • the control unit 350 preferably uses the clutch start delay and clutch stop delay to adjust the time at which the control unit 350 sends control signals to the swath controller 1500 such that seed begins to dispense or stops dispensing at the desired position in the field.
  • the control unit 350 estimates the time to the next stop-planting boundary at block 3652 (preferably using the current planter speed and the distance to the boundary) and compares said time to the clutch stop delay at block 3654. If the time to the next stop-planting boundary is equal to the clutch stop delay, then the control unit 350 preferably disengages the clutch at block 3656.
  • the control unit 350 estimates the time to the next start-planting boundary at block 3762 (preferably using the current planter speed and the distance to the boundary) and compares said time to the motor stop delay at block 3764.
  • control unit 350 preferably starts the motor at block 3766.
  • the foregoing process 3500 may be performed during in-field operation in order to determine the clutch start delay and clutch stop delay under current or near-current operating conditions.
  • FIG. 16A shows a graph 4000 illustrating components of delay associated with swath controllers 1500.
  • the x-axis 4145 of graph 4000 represents the distance (in inches) traveled by the planter 10 after the clutch of the swath controller 1500 is disengaged.
  • Data sets 4150 and 4155 represent tests performed at varying seed population rates 4140 in units of seeds per acre.
  • Bars 4100 represent a physical delay (measured in inches traveled) associated with the electronic and pneumatic components of the variable rate drive 1600.
  • Bars 4110 represent a rotational delay (measured in inches traveled) resulting from the mechanical action of the clutch in the swath controller 1500.
  • Bars 4120 represent a delay (measured in inches traveled) associated with the time required for the last seed 11 to be released from the seed meter 30 and pass the seed sensor 200.
  • Each set 4160 of data shows (from bottom to top) the total delay including the rotational delay 4110, the total delay not including the rotational delay 4110, and a last plant range 4130 representing the range between total delay without rotational delay 4110 and with rotational delay 4110.
  • the rotational delay 4110 varies because once the clutch is disengaged at a random rotational position of a shaft rotating within the clutch, the clutch will have to rotate through varying degrees before contacting a stopping member.
  • the range in rotational delay 4110 will change based on the seed population rate because the clutch will be rotating faster at higher seed population rates.
  • a preferred embodiment of seeding control system 1005 is configured to determine a range of delays between a control signal sent to the swath controller 1500 and an operational change in the swath controller 1500, namely engaging or disengaging the clutch.
  • the control unit 350 preferably performs this process multiple times to obtain a distribution of clutch stop delays.
  • the tenth percentile of the distribution of clutch stop delays is approximately equal to the physical delay 4100.
  • the control unit 350 determines and stores a total clutch stop delay (preferably as determined in blocks 3530 through 3555 in process 3500 of FIG. 6 ) at block 4510. This process is repeated (preferably at the same seed population rate) until clutch stop delay has been determined a threshold number of times (e.g., five) at block 4520.
  • the control unit 350 preferably determines the fixed physical clutch stop delay 4100 (e.g., by finding the tenth percentile of the distribution of total delays).
  • the control unit 350 preferably determines the population-dependent rotational clutch stop delay 4110 (e.g., by subtracting the 10th percentile of the distribution of total delays from the ninetieth percentile of the distribution of total delays).
  • the control unit 350 when the control unit 350 is accessing the clutch stop delay (e.g., at step 3654 of process 3600 illustrated in FIG. 15B ), the control unit preferably modifies the rotational delay 4110 based on the ratio between the population rate at which the rotational delay 4110 was determined and the active population rate. For example, if the rotational delay 4110 was determined at a population of 40,000 seeds per acre, then the rotational delay would be doubled at a population of 20,000 seeds per acre. Thus, the control unit 350 preferably adjusts a predicted component of clutch stop delay based on the active population rate.
  • the planter monitor 1000 preferably displays the physical delay 4100, the rotational delay 4110 and the fall delay 4120 to the operator.
  • the planter monitor also displays the sum of the fall delay 4120 and the physical delay 4100 to the operator.
  • the planter monitor 1000 preferably displays said sum as a "Fixed Delay” and said rotational delay 4110 as a "Variable Delay.”
  • the planter monitor 1000 thus isolates a fixed portion of the clutch delay from a variable portion of the clutch delay associated with the swath control systems 1500. With this information, the operator is able to see the benefit of making changes in clutch mounting location in order to reduce the variable delay.
  • each calibration routine described herein could be performed prior to planting or in-field during planting.
  • a calibration routine may be initiated by the operator using a series of screens on the planter monitor 1000.
  • the cab module 1105 preferably includes switches configured to allow the operator to briefly run the variable rate drives 1600 in order to load the seed meters 30 with seeds 11 prior to a pre-planting calibration routine. These switches may also be used to turn the variable rate drives 1600 on and off during a pre-planting calibration routine. The switches may also be used to selectively engage and disengage the swath controllers 1500 during a pre-planting calibration routine.
  • the seed sensors 200 preferably continue to provide seed pulses to the control unit 350.
  • the control unit 350 is preferably able to measure delays associated with the variable rate drives 1600 and the swath controllers 1500 during planting.
  • the seed pulses from the seed sensors 200 in each row unit 12 of the planter 10 are communicated to the planter monitor 1000.
  • the planter monitor 1000 is in electrical communication with the GPS unit 100, the cab module 1105, the radar system 1205 and the control unit 350.
  • the control unit 350 is in electrical communication with the individual swath controllers 1500 and variable rate drives 1600 and the height sensor 705.
  • the planter monitor 1000 is preferably configured to allow an operator to enter commands and input data including seed population rates and mapping information.
  • the operator enters a desired seed population rate to the planter monitor 1000.
  • the operator then pulls the planter 10 across the field.
  • the planter monitor 1000 relays the desired seed population to the control unit 350 and determines the speed of the planter 10 using signals from the GPS unit 100 and/or the radar system 1205.
  • the planter monitor 1000 displays the speed to the operator and transmits the speed to the control unit 350.
  • the control unit 350 determines an appropriate speed of the seed meter 30 to obtain the desired seed population rate based on the speed of the planter 10 and other criteria including the size of seed meter 30, the number of seed-entraining features on seed meter 30, and other criteria affecting the rate of seed delivery.
  • the control unit 350 determines the actual current speed of the seed meter 30 based on the encoder pulse of the variable rate drive 1600 and sends an appropriate control signal to the variable rate drives 1600.
  • Each variable rate drive 1600 is configured to individually variably drive a seed meter 30 in each row unit of the planter 10 at a speed based on the control signal received from the control unit 350.
  • the control unit 350 uses a signal from the height sensor 705 to determine whether the planter 10 is lifted in a transport position. If the control unit 350 determines that the planter 10 is in a transport position, it will preferably direct the variable rate drives 1600 to stop driving the seed meters 30.
  • the seeding control system 1005 also generates a seed placement map. As each seed 11 passes through the seed tube 32, the seed sensor 200 sends a seed pulse to the control unit 350.
  • the planter monitor 1000 associates the time of the seed pulse with a location of the GPS unit 100 and determines the location in the field that the seed 11 was dispensed based on the GPS offsets entered by the operator in the setup phase as previously described.
  • the planter monitor 1000 then adds the position of the seed 11 to a seed placement map that preferably displayed to the operator and is used to determine "stop planting" conditions.
  • the planter monitor 1000 determines if a stop-planting condition exists for any swath (comprising a single row unit or a set of row units) of the planter 10, the planter monitor 1000 sends a stop-planting signal to the control unit 350.
  • the control unit 350 then sends a signal to actuate the swath controller 1500 such that the clutch is disengaged so that the seed meters 30 in the swath are not being driven until the clutch is re-engaged when the stop planting condition passes.
  • the clutches may be any pneumatic or electrical clutches as are known in the art.
  • the seeding control system 1005 may also be used to alert the operator of operational problems within the variable rate drives 1600 and the swath controllers 1500 using seed pulses during in-field operations. Referring to FIG. 19C , a preferred process 1630 for providing such alerts to the operator in-field is illustrated.
  • the control unit determines whether the variable rate drive 1600 associated with the row unit 12 is on. Once the variable rate drive is on, the control unit determines at block 1632 whether the swath controller 1500 associated with the row unit is engaged. If the associated swath controller is not engaged, then at block 1634 the control unit determines whether seeds are being deposited at the row. If seeds are not being deposited, a successful operation descriptor is stored at block 1635.
  • a failed clutch operation descriptor is stored at block 1638 and an alarm is preferably displayed to the user.
  • the control unit determines whether seeds are being deposited. If seeds are being deposited, then a successful operation descriptor is stored at block 1635. If seeds are not being deposited, then a failed motor operation descriptor is stored at block 1637 and an alarm is preferably displayed to the user.
  • the seeding control system is also preferably configured to determine whether an electrical or hydraulic error has occurred. It should be appreciated that the seeding control system 1005 could also be used to detect other operational problems with the planter 10 that affect the delivery of seeds.
  • FIG. 17A illustrates a preferred process 5000 used by the seeding control system 1005 to determine the speed of planter 10.
  • the control unit 350 determines whether acceleration of the planter 10 is greater than an upper threshold (preferably 1.5 ft/s 2 ) based on the signal provided by horizontal accelerometer 400 at block 5100. If the acceleration is greater than the upper threshold, the control unit 350 determines the speed of planter 10 using the highest stable value reported by the GPS unit 100 (the "GPS-reported speed") and the radar system 1205 (the "radar-reported speed”) at block 5150.
  • the planter monitor 1000 determines whether the GPS-reported speed is stable using an algorithm or other method as is known in the art.
  • the cab module also includes processing circuitry configured to determine whether the radar-reported speed is stable using an algorithm or other method as is known in the art.
  • the control unit 350 determines whether the acceleration of planter 10 is less than a lower threshold (preferably -1.5 ft/s 2 ) based on the signal provided by horizontal accelerometer 400.
  • the control unit 350 determines the speed of planter 10 using the lowest stable value reported by the GPS unit 100 (the "GPS-reported speed") and the radar system 1205 (the "radar-reported speed").
  • the control unit 350 determines the speed of planter 10 using the speed input previously selected by the operator. As discussed herein under “Setup,” the planter monitor 1000 is configured to allow a user to select a preferred speed input.
  • the control unit 350 will often need to stop the variable rate drives 1600 when the planter 10 is not moving. Likewise, the control unit 350 will need to start the variable rate drives 1600 when the planter 10 resumes moving. As previously discussed, empirical data has shown that data from the GPS unit 100 is delayed and untrustworthy at speeds lower than approximately one mile per hour. Empirical data has also shown that the GPS unit 100 will indicate speeds of 0.1 or 0.2 miles per hour when the planter 10 is actually stopped. For these reasons, speed inputs provided by those systems are non-ideal for determining when the planter 10 will stop or determining when the planter 10 has resumed travel. Thus in a preferred embodiment, the control unit 350 predicts a stopping time of the planter 10 using the signal from horizontal accelerometer 400 and sends an appropriately-timed control signal to stop the variable rate drive 1600.
  • a preferred process 5500 for carrying out this method is illustrated in FIG. 17B .
  • the control unit 350 determines an estimated stopping time based on the currently utilized speed input and deceleration rates indicated by the horizontal accelerometer 400 at block 5520.
  • the stopping time is approximately equal to the stop delay associated with the variable rate drive (preferably determined as described above) at block 5530, the control unit 350 preferably instructs the variable rate drives 1600 to stop driving the seed meters 30 at block 5540.
  • the control unit 350 preferably determines that the planter 10 has resumed travel by integrating the signal provided by the horizontal accelerometer 400 at block 1550. When the speed determined from this method reaches a threshold value at block 5560, the control unit 350 preferably instructs the variable rate drives 1600 to resume driving the seed meters 30 at block 5570.
  • the planter monitor 1000 determines that a stop-planting condition exists when a section of the planter 10 is passing over a previously planted seed based on the seed placement map described above.
  • the planter monitor 1000 also determines that a stop-planting condition exists when a section of the planter 10 travels across a boundary 1505 set by the operator.
  • the boundary 1505 may comprise an outer boundary of the field to be planted or an inner boundary within said field enclosing a waterway or obstacle on which the operator does not wish to dispense seed.
  • the boundary 1505 may also enclose a headland in which the operator intends to plant seed later.
  • the operator may import such boundaries to the planter monitor 1000 using any suitable data storage device, including a USB flash drive, an internet connection, etc.
  • the planter monitor 1000 may also record such boundaries by storing the location of the GPS unit 100 while the operator drives around the boundary.
  • the planter monitor 1000 is preferably configured to allow the operator to instruct the swath controllers 1500 to stop the seed meters 30 during one, all, or any subset of the stop-planting conditions herein described.
  • FIG. 18 illustrates a user interface screen 6000 displayed on the planter monitor 1000 and configured to allow a user to select stop-planting conditions as described above.
  • the operator may press or select windows 6100, 6200, 6300 or 6400 to activate or deactivate a stop-planting condition.
  • the associated window preferably displays the same using a strikethrough or other indicator as illustrated in window 6300.
  • the operator presses or selects window 6600 to save the set of activated stop-planting conditions.
  • Window 6500 indicates whether swath controllers 1500 are enabled for any stop-planting condition.
  • stop-planting conditions described herein other stop-planting conditions based upon the location, speed, orientation or configuration of the planter 10 could be incorporated into the planter monitor 1000 or designated by the operator.
  • control unit 350 processing functions performed by the control unit 350 as recited herein could also be performed by the planter monitor 1000.
  • processing functions performed by the planter monitor 1000 as recited herein could also be performed by the control unit 350.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Sowing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Pretreatment Of Seeds And Plants (AREA)
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US20200329630A1 (en) 2020-10-22
AR082397A1 (es) 2012-12-05
LT3236208T (lt) 2022-04-11
EP2598840B1 (fr) 2017-07-19
EP3236208B1 (fr) 2022-02-02
LT2598840T (lt) 2017-10-25
HUE035939T2 (en) 2018-05-28
US11516957B2 (en) 2022-12-06
US9955625B2 (en) 2018-05-01
WO2012015957A1 (fr) 2012-02-02
EP2598840A4 (fr) 2015-01-07
CA2806901A1 (fr) 2012-02-02
US20180242514A1 (en) 2018-08-30
US20130124055A1 (en) 2013-05-16
BR112013002104A2 (pt) 2016-05-24
ES2639389T3 (es) 2017-10-26
BR112013002104B1 (pt) 2020-10-27
AU2011282727A1 (en) 2013-02-28
UA110623C2 (uk) 2016-01-25
ES2906825T3 (es) 2022-04-20
US10736258B2 (en) 2020-08-11
EP2598840A1 (fr) 2013-06-05

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